Q. Scheduling is quantitative scheduling in the context that quantities to be executed at different locations of the construction project form the elements of the schedule. Also Q. Scheduling is Queue Scheduling in the context that trades pass through the different segments of the project in a queue sequence. No interference between two activities is allowed at the same location. It is derived basically from the Line of balance technique with some modifications to allow for the non repetitive models that is characteristic of the majority of construction projects. Analytical comparison of possible alternatives in respect additional costs, likely to be incurred, as proportion of the most economic alternative. Optimization of performance rates for each alternative. Start and Finish dates for each crew on site that ensures a continuation of work flow. A due consideration of days off.